Answer:
b. an economic profit of 100%.
Step-by-step explanation:
A monopoly is when there is only one firm operating in the industry. There are high barriers to entry of firms in a monopoly. Profit is maximised where MR = MC.
Economic profit is affected by the entry or exit of firms into the industry in the long run. Due to the high barriers to entry, a monopoly earns economic profit in the long run.
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